All of the benchmark results achieved are then combined into a single number. As this graph will grow over time and cards won't be re-tested, next to each model you'll find the driver version that was used when the card was benchmarked.

Overall you can see we get a nice little performance boost from the stock HD 6870 and while the overclock isn't the largest, it manages to sit right on the tail of the cheaper but much more overclocked HD 6850 at over 1GHz which is impressive.